Table 1. Details of the three studies included.

Reference	Patient age, mean ± SD, years	Gender male, %	No. of polyps, n	Polyp size, mean ± SD, mm	Macroscopic appearance, n		Histological findings, n					Location of the polyp, n		No. of all adverse events, n	Incomplete resection rate, %	Complete retrieval rate, %
					0 – I	0 – II	TA	AA	HP	SSP	OP	Right	Left
Cold snare polypectomy
Kawamura et al., 2017 19	NA	NA	341	NA	234	107	333	10	21	11	12	207	134	34	1.8	98.2
Zhang et al., 2017 21	64.5 ± 7.7	96 (53.6 %)	267	7.4 ± 1.4	164	81	189	45	46	25	7	141	126	5	8.5	100
Papastergiou et al., 2018 20	63.1 ± 10.3	46 (59.7 %)	83	8.2 ± 1.6	38	45	59	0	7	17	0	40	43	3	7.2	92.8
Hot snare polypectomy
Kawamura et al., 2017 19	NA	NA	346	NA	234	112	336	15	32	9	7	193	153	16	2.6	99.3
Zhang et al., 2017 21	65.8 ± 9.4	101 (56.4 %)	258	7.7 ± 1.5	164	74	175	41	49	26	15	140	118	3	1.5	100
Papastergiou et al., 2018 20	64.1 ± 10.9	45 (57.7 %)	81	8.3 ± 1.4	34	47	60	0	8	13	0	36	45	1	3.7	95.1

NA, not available; TA, tubular adenoma; AA, advanced adenoma; HP, hyperplastic polyps; SSP, sessile serrated polyps; OP, other polyps.